UV固化蓖麻油基聚氨酯丙烯酸酯/SiO_(2)杂化材料的制备与性能  

Preparation and properties of UV-cured castor oil-based polyurethane acrylate/SiO_(2) hybrid materials

作　　者：麦颖 王锋[1] 胡祝平 于英豪[1] MAI Ying;WANG Feng;HU Zhuping;YU Yinghao(School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510630,Guangdong,China)

机构地区：[1]华南理工大学化学与化工学院,广东广州510630

出　　处：《精细化工》2022年第3期505-512,共8页Fine Chemicals

基　　金：广东省自然科学基金(2021A1515010140);广东省绿色化学产品技术重点实验室开放基金资助项目(GC202122)。

摘　　要：以异佛尔酮二异氰酸酯(IPDI)、蓖麻油(CO)和丙烯酸羟乙酯(HEA)为原料合成了蓖麻油基聚氨酯丙烯酸酯(COPUA);以正硅酸乙酯(TEOS)和3-(异丁烯酰氧)丙基三甲氧基硅烷(MEMO)为前驱物通过溶胶-凝胶法制备了改性硅溶胶,将其作为无机相与COPUA有机相复合得到了UV固化COPUA/SiO_(2)杂化材料。考察了MEMO与TEOS的物质的量比对改性硅溶胶性能的影响,当MEMO与TEOS物质的量比为1∶1时得到性能最佳改性硅溶胶MT-1。在此基础上研究了COPUA/SiO_(2)杂化材料中MT-1的添加量对固化涂层性能的影响。用FTIR、TEM、SEM、TGA、AFM对COPUA/SiO_(2)杂化材料和涂层进行了结构表征,测试杂化涂层的力学性能和表面性能。结果表明,当MT-1添加量为COPUA质量的15%时,制备的涂层表面光滑平整,纳米SiO_(2)在COPUA中分散效果良好,其透光率达到100.20%,硬度为5H,附着力0级,柔韧性1 mm;拉伸强度达到13.52 MPa,断裂伸长率为7.49%。Castor oil-based polyurethane acrylate(COPUA)was synthesized from isophorone diisocyanate(IPDI),castor oil(CO)and hydroxyethyl acrylate(HEA).Modified silica sol was prepared by sol-gel method using tetraethyl orthosilicate(TEOS)and 3-methacryloxypropyltrimethoxysilane(MEMO)as raw materials and then combined with COPUA to prepare COPUA/SiO_(2)hybrid materials.The effect of molar ratio of MEMO to TEOS on the properties of modified silica sol was investigated.The optimal molar ratio of MEMO to TEOS was 1∶1(MT-1).The effect of addition amount of MT-1 on the properties of COPUA/SiO_(2)hybrid material was studied.The COPUA/SiO_(2)hybrid materials and coatings were characterized by FTIR,TEM,SEM,TGA and AFM.The mechanical and surface properties of hybrid coatings were tested.The result showed that when the addition amount of MT-1 was 15% of the mass of COPUA,the prepared hybrid coating had a smooth and flat surface,indicating that SiO_(2)particles were evenly dispersed in COPUA.The light transmittance of the prepared coating reached 100.20%,the hardness was 5H,the adhesion was grade 0 and the flexibility was 1 mm,the tensile strength was up to 13.52 MPa and the elongation of section was 7.49%.

关 键 词：蓖麻油基聚氨酯丙烯酸酯 改性硅溶胶 杂化材料 力学性能 UV固化 功能材料 

分 类 号：TQ630.7[化学工程—精细化工]